Staged collaborative simulation analysis method for power distribution system

Abstract

The invention discloses a staged co-simulation analysis method for a power distribution system, and relates to the technical field of aviation power distribution. According to the method, the architecture design of power distribution and simulation verification of the system control and protection strategy are realized step by step by constructing the power distribution system simulation models of a plurality of development stages, and finally verification of the reasonability of the system control and protection strategy is realized. The power distribution system simulation model of each stage comprises a power supply module, a power distribution module, a load module, a control module, a detection module and a fault injection module. The method is provided for simulation analysis and verification of complex control logic and electrical characteristics of the power distribution system, manual calculation is reduced, and the efficiency and reliability of system design are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation power distribution systems, and in particular relates to a staged collaborative simulation analysis method for a power distribution system. Background Art

[0002] With the development of more electric aircraft, the power distribution system is becoming more and more complex, the control requirements are gradually increasing, the control states are more numerous, and the control logic is also more complex. When the control logic is becoming more and more complex, the use of manual calculations has poor reliability, low efficiency, long development cycle, and is difficult to test. The conversion between implementation states may cause the logic to be unclosed but difficult to find in the early design stage, and changes and maintenance are cumbersome and inconvenient.

[0003] At present, general control logic simulation verification is the simulation verification of the compliance of specific control logic with design requirements. However, the comprehensiveness of the verification cannot be guaranteed. Therefore, it is very necessary to establish a systematic and phased simulation verification implementation method for different stages of system design.

[0004] In the prior art, CN118071072A "Analysis method and analysis device for power supply system of unmanned aerial vehicle" focuses on simulation analysis of the design capacity of its power supply system according to the mission profile of the unmanned aerial vehicle. CN117034463A "A power supply and distribution system for a high-dynamic and high-cooperative launch vehicle based on MBSE" focuses on the application of MBSE design methods to achieve compliance with the design attributes and technical indicators of the power supply and distribution system. CN115114789A "A method for automatic simulation and modeling of a distribution system" focuses on the automatic simulation and modeling method of the distribution system, which is quite different from the content of this patent; CN107729690A "A method and device for simulating a DC power distribution system" focuses on the simulation method of the DC power distribution system including power electronic converters and DC circuit breakers, providing a basis and reference for the actual development and testing of the DC power distribution system. Summary of the invention

[0005] Based on the above background, this patent focuses on the simulation verification of the rationality of the control and protection strategy of the power distribution system, and realizes the analysis of the control and protection strategy of the power distribution system through staged simulation objectives and simulation methods. The purpose of the invention is to provide a staged collaborative simulation method and device for complex aviation power distribution systems to improve the efficiency and reliability of power distribution system design.

[0006] In view of this, according to one aspect of an embodiment of the present invention, a staged collaborative simulation analysis method for a power distribution system is provided, comprising:

[0007] Step 1: According to the preliminary technical requirements of the system, establish a steady-state logic simulation model of the power distribution system, and use the steady-state logic simulation model of the power distribution system to perform a system steady-state logic simulation test;

[0008] Step 2: Based on the steady-state logic simulation model of the power distribution system, introduce the system failure mode, establish the steady-state logic failure simulation model of the power distribution system, and use the steady-state logic failure simulation model of the power distribution system to perform the system steady-state logic failure simulation test;

[0009] Step 3: On the basis of the steady-state logic simulation model of the power distribution system, the time parameters and system redundancy design of the power distribution system are supplemented, a state transition simulation model of the power distribution system is established, and the state transition simulation model of the power distribution system is used to perform a system state transition simulation test;

[0010] Step 4: Based on the power distribution system state transition simulation model, refine the equipment internal control and protection implementation method, introduce equipment failure mode, establish a power distribution system function implementation simulation model, and use the power distribution system function implementation simulation model to perform system function implementation simulation test;

[0011] Step 5: On the basis of the power distribution system function realization simulation model, according to the electrical performance parameters of the equipment, establish the power distribution system performance realization simulation model, and conduct system performance realization simulation test.

[0012] Optionally, the power distribution system steady-state logic simulation model includes:

[0013] The aircraft power supply simplified module also includes one or more of a main power supply, a backup power supply, an emergency power supply, a ground power supply and a secondary power supply simplified module;

[0014] The preliminary architecture module of power distribution also includes busbar settings, contactor settings and their connection relationships;

[0015] The external interactive signal module also includes key signals for the interaction between the switch control panel, the human-machine interface and the power distribution system;

[0016] System load simplification module, used to simulate the load characteristics of aircraft electrical equipment;

[0017] The system preliminary control module is used to collect status signals from the aircraft power simplification module, external interaction signal module, and power distribution preliminary architecture module, determine the current power distribution system status based on the collected status signals, and output the power distribution system control signal.

[0018] Optionally, the method for performing a system steady-state logic simulation test further includes:

[0019] Generate multiple steady-state operation test cases based on the steady-state operation related requirements in the preliminary technical requirements of the system;

[0020] Call the test case to perform system steady-state test to confirm the compliance of the steady-state logic simulation model of the power distribution system with the simulation requirements.

[0021] Optionally, the power distribution system steady-state logic fault simulation model further includes:

[0022] Power supply fault injection module, used to simulate the fault condition of power supply losing output;

[0023] Contactor fault injection module, used to simulate the fault conditions of abnormal opening and closing of contactors;

[0024] Busbar fault injection module, used to simulate the fault condition of busbar short circuit causing voltage over-limit;

[0025] The diode fault injection module is used to simulate the fault conditions of diode open circuit and short circuit.

[0026] Optionally, the method for performing a system steady-state logic fault simulation test further includes:

[0027] Combine system steady state and failure modes to design multiple steady state logic failure test cases;

[0028] According to the test cases, the steady-state logic fault simulation model of the power distribution system is used to perform coupling tests of the system steady-state and fault modes.

[0029] Optionally, the method for establishing a power distribution system state transition simulation model further includes:

[0030] Determine the functional allocation of system equipment, decompose the steady-state logic simulation model of the power distribution system into different equipment subsystems, and configure corresponding input and output interfaces for each equipment subsystem;

[0031] Improve the time parameters in the model, including but not limited to contactor action time, data delay time and data filtering time;

[0032] Improve the redundant design of the system in the model, including but not limited to redundant power supply of equipment, redundant control instructions, redundant acquisition, and hardware interlocking of the distribution network;

[0033] Add AC power supply parallel check, and form an AC power supply parallel detection module by detecting the number of existing busbar power supply paths;

[0034] The improved equipment modules and AC power supply parallel detection module are connected to obtain a distribution system state transition simulation model.

[0035] Optionally, the method for performing a system state transition simulation test further includes:

[0036] Based on multiple steady-state logic fault test cases, two-by-two combinations are performed to obtain state transition test cases;

[0037] According to the distribution system state transition simulation model, the system state transition simulation test is carried out using the state transition test case to monitor the bus power supply status and AC power supply parallel status.

[0038] Optionally, the method for establishing a power distribution system function realization simulation model includes:

[0039] Confirm the system hardware connection relationship and refine the architecture module;

[0040] Confirm the implementation method of internal control and protection of the equipment and refine the control module;

[0041] Add device-level failure modes based on device implementation methods, including one or more of contactor / relay auxiliary contact failure, controller failure, line failure, and controller power supply failure.

[0042] Optionally, the method for performing a system function realization simulation test includes:

[0043] According to the device function realization, adjust the state transition test case interface and establish the function realization test case;

[0044] Carry out simulation tests on system function implementation to verify the rationality of the equipment implementation method and the system robustness under fault conditions.

[0045] Optionally, the method for performing a system performance simulation test includes:

[0046] Adjust the function realization test cases and establish the performance realization test cases according to the device performance realization method;

[0047] Conduct simulation tests on system performance under system control and protection and / or load management functions.

[0048] The present invention is a staged collaborative simulation and analysis method for a power distribution system, which is applicable to aviation power distribution systems. It provides a method for simulation and analysis verification of complex control logic and electrical characteristics of power distribution systems. It is applicable to a variety of power distribution system simulation and analysis occasions, reduces manual calculations, and improves the efficiency and reliability of system design. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A model of an aircraft power distribution system according to an embodiment of the present invention;

[0050] Figure 2 The system preliminary control module and the external interactive signal module of the embodiment disclosed in the present invention;

[0051] Figure 3 This is a steady-state working test case of the disclosed embodiment of the present invention;

[0052] Figure 4The busbar status result of the system steady-state logic simulation test of the embodiment disclosed in the present invention;

[0053] Figure 5 The contactor status result of the system steady-state logic simulation test of the embodiment disclosed in the present invention;

[0054] Figure 6 It is a contactor fault injection module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] According to one aspect of an embodiment of the present invention, a staged collaborative simulation analysis method for a power distribution system is provided, comprising:

[0057] Step 1: According to the preliminary technical requirements of the system, establish a steady-state logic simulation model of the power distribution system, and use the steady-state logic simulation model of the power distribution system to perform a system steady-state logic simulation test;

[0058] Step 2: Based on the steady-state logic simulation model of the power distribution system, introduce the system failure mode, establish the steady-state logic failure simulation model of the power distribution system, and use the steady-state logic failure simulation model of the power distribution system to perform the system steady-state logic failure simulation test;

[0059] Step 3: On the basis of the steady-state logic simulation model of the power distribution system, the time parameters and system redundancy design of the power distribution system are supplemented, a state transition simulation model of the power distribution system is established, and the state transition simulation model of the power distribution system is used to perform a system state transition simulation test;

[0060] Step 4: Based on the power distribution system state transition simulation model, refine the equipment internal control and protection implementation method, introduce equipment failure mode, establish a power distribution system function implementation simulation model, and use the power distribution system function implementation simulation model to perform system function implementation simulation test;

[0061] Step 5: On the basis of the power distribution system function realization simulation model, according to the electrical performance parameters of the equipment, establish the power distribution system performance realization simulation model, and conduct system performance realization simulation test.

[0062] Furthermore, the steady-state logic simulation model of the power distribution system includes:

[0063] The aircraft power supply simplified module also includes one or more of a main power supply, a backup power supply, an emergency power supply, a ground power supply and a secondary power supply simplified module;

[0064] The preliminary architecture module of power distribution also includes busbar settings, contactor settings and their connection relationships;

[0065] The external interactive signal module also includes key signals for the interaction between the switch control panel, the human-machine interface and the power distribution system;

[0066] System load simplification module, used to simulate the load characteristics of aircraft electrical equipment;

[0067] The system preliminary control module is used to collect status signals from the aircraft power simplification module, external interaction signal module, and power distribution preliminary architecture module, determine the current power distribution system status based on the collected status signals, and output the power distribution system control signal.

[0068] Furthermore, the method for performing a system steady-state logic simulation test also includes:

[0069] Generate multiple steady-state operation test cases based on the steady-state operation related requirements in the preliminary technical requirements of the system;

[0070] Call the test case to perform system steady-state test to confirm the compliance of the steady-state logic simulation model of the power distribution system with the simulation requirements.

[0071] Furthermore, the distribution system steady-state logic fault simulation model also includes:

[0072] Power supply fault injection module, used to simulate the fault condition of power supply losing output;

[0073] Contactor fault injection module, used to simulate the fault conditions of abnormal opening and closing of contactors;

[0074] Busbar fault injection module, used to simulate the fault condition of busbar short circuit causing voltage over-limit;

[0075] The diode fault injection module is used to simulate the fault conditions of diode open circuit and short circuit.

[0076] Furthermore, the method for performing a system steady-state logic fault simulation test also includes:

[0077] Combine system steady state and failure modes to design multiple steady state logic failure test cases;

[0078] According to the test cases, the steady-state logic fault simulation model of the power distribution system is used to perform coupling tests of the system steady-state and fault modes.

[0079] Furthermore, the method for establishing a power distribution system state transition simulation model also includes:

[0080] Determine the functional allocation of system equipment, decompose the steady-state logic simulation model of the power distribution system into different equipment subsystems, and configure corresponding input and output interfaces for each equipment subsystem;

[0081] Improve the time parameters in the model, including but not limited to contactor action time, data delay time and data filtering time;

[0082] Improve the redundant design of the system in the model, including but not limited to redundant power supply of equipment, redundant control instructions, redundant acquisition, and hardware interlocking of the distribution network;

[0083] Add AC power supply parallel check, and form an AC power supply parallel detection module by detecting the number of existing busbar power supply paths;

[0084] The improved equipment modules and AC power supply parallel detection module are connected to obtain a distribution system state transition simulation model.

[0085] Furthermore, the method for performing a system state transition simulation test also includes:

[0086] Based on multiple steady-state logic fault test cases, two-by-two combinations are performed to obtain state transition test cases;

[0087] According to the distribution system state transition simulation model, the system state transition simulation test is carried out using the state transition test case to monitor the bus power supply status and AC power supply parallel status.

[0088] Furthermore, the method for establishing a power distribution system function realization simulation model includes:

[0089] Confirm the system hardware connection relationship and refine the architecture module;

[0090] Confirm the implementation method of internal control and protection of the equipment and refine the control module;

[0091] Add device-level failure modes based on device implementation methods, including one or more of contactor / relay auxiliary contact failure, controller failure, line failure, and controller power supply failure.

[0092] Furthermore, the method for performing a system function realization simulation test includes:

[0093] According to the device function realization, adjust the state transition test case interface and establish the function realization test case;

[0094] Carry out simulation tests on system function implementation to verify the rationality of the equipment implementation method and the system robustness under fault conditions.

[0095] Furthermore, the method for performing a system performance simulation test includes:

[0096] Adjust the function realization test cases and establish the performance realization test cases according to the device performance realization method;

[0097] Conduct simulation tests on system performance under system control and protection and / or load management functions.

[0098] Example 1

[0099] like Figure 1 As shown, the present invention provides a staged simulation analysis method for a power distribution system, comprising:

[0100] The preliminary technical requirements of the system describe the high-level target requirements of the system, and describe the system design goals from multiple aspects such as power supply priority, working mode, fault mode, power protection, fault isolation, etc. According to the preliminary technical requirements of the system, a steady-state logic simulation model of the power distribution system is established. The steady-state logic simulation model of the power distribution system is used to perform system steady-state logic simulation tests.

[0101] Based on the steady-state logic simulation model of the distribution system, the system failure mode is introduced to establish the steady-state logic fault simulation model of the distribution system. The steady-state logic fault simulation model of the distribution system is used to perform the system steady-state logic fault simulation test. The main goal of this stage is to verify the control strategy of the distribution system in the system steady-state scenario. The system models are all simplified ideal modules, without distinguishing the implementation equipment and without equipment attributes.

[0102] On the basis of the steady-state logic simulation model of the power distribution system, the time parameters and system redundancy design of the power distribution system are supplemented to establish the state transition simulation model of the power distribution system. The state transition simulation model of the power distribution system is used to perform the system state transition simulation test. The main focus is on the impact of time parameters on the control logic implementation and the power distribution system. After the system control and protection strategies are allocated to the device level, the relevant parameters that cause signal delays are preliminarily configured. Provide support for the allocation of subsequent system control and protection strategy time indicators.

[0103] Based on the distribution system state transition simulation model, the control module is established using the specific implementation method of the device-level control and protection functions to replace the control module in the distribution system steady-state logic fault simulation model, and the device-level fault mode is introduced according to the specific implementation method of the device for simulation testing. The main goal of this stage is to verify the rationality of the system logic implementation method.

[0104] Based on the simulation model of the power distribution system function realization, the power distribution system performance realization simulation model is established according to the electrical performance parameters of the equipment, and the system performance realization simulation test is carried out. The verification goal of this stage is to evaluate the overall electrical performance of the system. The device-level electrical model and the system model are integrated and coordinated through the interface tool software. The device-level electrical model and the system model exchange parameter information and operate in coordination to realize the coordinated simulation test of the power distribution system performance realization.

[0105] According to technical requirements, the aircraft power supply simplification module, power distribution preliminary architecture module, external interaction signal module, system load simplification module and system preliminary control module are established. In the system preliminary control module, the state machine is used to establish the corresponding module and specify the corresponding relationship between input and output.

[0106] Design steady-state operation test cases. Write corresponding test cases in the system model according to the preliminary technical requirements of the system, and connect the steady-state operation test cases with the steady-state logic simulation model of the distribution system.

[0107] Conduct system steady-state logic simulation test, confirm the model's compliance with technical requirements one by one, identify problems if they do not meet the requirements, return demand issues to the system preliminary design requirements for change and iteration, and return model issues to the distribution system steady-state logic simulation model for change and iteration.

[0108] Establish device fault injection modules such as power supply failure, contactor failure to open, contactor failure to disconnect, busbar failure, circuit breaker failure, fuse failure, diode failure, etc. Power supply failure includes generator failure, transformer rectifier failure, and transformer failure. By connecting a controllable switch in series with the switch branch, the branch is forced to open to simulate the contactor failure to open. By connecting a controllable switch in parallel with the switch, the branch is forced to connect to simulate the contactor failure to disconnect. Use the fault injection module to replace the corresponding module in the steady-state logic simulation model of the distribution system to establish a steady-state logic fault simulation model of the distribution system.

[0109] Combine the steady-state working test cases and fault modes to design steady-state logic fault test cases. Combine the input signal and fault injection signal to form a comprehensive traversal test case, and connect the steady-state logic fault test case with the steady-state logic fault simulation model of the distribution system.

[0110] Conduct system steady-state logic fault simulation test. Based on the test results, judge the rationality of the distribution network architecture and preliminary control logic, the control strategy's compliance with power supply priorities, and the operation of the preliminary protection strategy and fault isolation design.

[0111] The steady-state logic fault simulation model of the power distribution system is decomposed into different equipment subsystems according to the functional distribution of system equipment, and corresponding input and output interfaces are configured for each equipment subsystem. These equipment include but are not limited to generator equipment, secondary power supply equipment, generator controller equipment, distribution device equipment, power grid management equipment, load distribution equipment, load equipment, and interactive panels.

[0112] Improve the time parameters in the model, including but not limited to contactor action time, data delay time and data filtering time. Contactor action time includes connection time and disconnection time. Data delay time refers to the sum of data hardware delay time and communication transmission delay time. Data filtering time is calculated based on data sampling time interval and data filtering algorithm.

[0113] Improve the redundant design of the system in the model, including but not limited to redundant power supply for equipment, redundant control instructions, redundant acquisition, and hardware interlocking of the distribution network. The motor controller equipment, distribution device equipment, grid management equipment, and load distribution equipment in the distribution system generally have multiple power supply sources, which come from different power supply buses. In the distribution network, in addition to using control modules to implement control strategies, contactor hardware interlocking is also used to implement or redundant control functions to improve the reliability and safety of the system.

[0114] Add AC power supply parallel check, establish an AC power supply parallel detection module by detecting whether there is a path that supplies power to the AC bus at the same time, and determine whether there is AC power supply parallel in the system.

[0115] Combined with the steady-state logic fault test cases, two-by-two combinations are performed to obtain state transition test cases. The state transition test cases are used to detect whether the power supply interruption time caused by the state transition is in line with expectations, and whether the transition action is in line with the designed sequence and time.

[0116] Conduct system state transition simulation tests to monitor busbar power supply interruption and AC power supply parallel connection. Determine the rationality of control and protection function decomposition and allocation based on the test results, and determine the response time requirements and redundancy design of each controller.

[0117] The distribution system state transition simulation model is further refined, mainly including the refinement of the architecture module and the control module. The refinement of the architecture module is mainly reflected in the refinement of the hard-wire connection, including the configuration of contactor auxiliary contacts, the simulation of contactor hard-wire interlocking, and the allocation of interfaces connected to the control module. The refinement of the control module is mainly the implementation method of the internal control and protection of the equipment. The functions are decomposed and refined according to the hardware and software conditions of the equipment, including data processing algorithms, control and protection software scheduling strategies, output instruction processing, etc.

[0118] Add device-level failure modes, including but not limited to contactor / relay auxiliary contact failure, controller failure, line failure, and controller power failure. The refinement of the model allows detailed system failure modes to be set at a lower level, extending the contactor failure mode from the main contact to the auxiliary contact. Introduce line open circuit failure, controller control disorder failure, controller power failure, and other failures.

[0119] Design function implementation test cases; expand state transition test cases in combination with device-level failure modes.

[0120] Conduct system function realization simulation test to verify the rationality of the equipment realization method and the system robustness under fault conditions.

[0121] Prepare electrical performance simulation models for power distribution devices, control devices, power supplies, loads, etc. Modify model interfaces to prepare for interface tool software system models.

[0122] The equipment electrical performance simulation model and the system model are connected through the interface tool software to enable the simulation data of the two to interact and establish a distribution system performance simulation model.

[0123] Design performance realization test cases. Basically the same as the function realization test cases, it is necessary to modify the module interface for electrical connection according to the interface electrical properties.

[0124] Carry out simulation test on system performance under functions such as system control and protection, load management, etc., judge the impact of power grid control on the power grid according to the test results, coordinate and rationality of protection function index setting and protection action design such as load protection, line protection, power supply protection, cascade protection, etc., rationality of fault isolation area realized by protection action, and other system performance evaluations.

[0125] Figure 1 A model of an aircraft power distribution system according to an embodiment of the present invention is schematically shown.

[0126] In an exemplary embodiment, a steady-state logic simulation model of a power distribution system is established according to the preliminary design requirements of a certain type of aircraft power distribution system. Figure 1As shown, G1 and G2 are simplified modules of the aircraft AC main power supply, and EP is a simplified module of the aircraft ground power supply. ACGB1, ACGB2, BTB1, BTB2, BTB5, and ACEPC are all contactor modules in the preliminary system architecture. BUS1 and BUS2 are bus modules in the preliminary system. LOAD1 and LOAD2 are simplified modules of the system load. ACGB1 connects the G1 main power supply to the BUS1 bus; ACGB2 connects the G2 main power supply to the BUS2 bus; BTB1, BTB3, and BTB5 are connected in series, and then connected in series to the BUS1 bus and the BUS2 bus. The node connected to BTB1 and BTB5 is the TIE1 node; ACEPC connects the EP ground power supply to the TIE1 node.

[0127] System preliminary design requirements, including:

[0128] First, when the ground power plug is not plugged in or the ground power switch is turned off, the ground power is unavailable. At this time, if both G1 and G2 main power supplies are available, G1 main power supplies power to BUS1 bus, and G2 main power supplies power to BUS2 bus; if either G1 or G2 main power supply is unavailable, the available main power supplies power both BUS1 and BUS2 buses.

[0129] Second, when the ground power plug is plugged in and the ground power switch is closed, the ground power is available. At this time, if both G1 and G2 main power supplies are unavailable, the ground power supplies power to the BUS1 and BUS2 buses; if the G1 main power supply is available, the G1 main power supply to BUS1 is maintained, and the G1 main power supply to BUS2 is prohibited; if the G2 main power supply is available, the G2 main power supply to BUS2 is maintained, and the G2 main power supply to BUS1 is prohibited.

[0130] Third, under no circumstances are G1 and G2 main power supplies allowed to be connected in parallel.

[0131] Fourth, during the state transition of the power distribution system, the power supply interruption time of BUS1 and BUS2 buses should be less than 200ms.

[0132] Fifth, during the trouble-free operation of the power distribution system, the power supply quality of BUS1 and BUS2 buses should comply with the relevant aviation airborne equipment power supply compatibility standards.

[0133] Among the above system design requirements, the first and second items are related to steady-state operation, the third and fourth items are related to state transition, and the fifth item is related to performance realization.

[0134] Example 2

[0135] Figure 2 The system preliminary control module and the external interactive signal module of the embodiment disclosed in the present invention are schematically shown.

[0136] like Figure 2 As shown, the system preliminary control module includes BTB_CTRL module and ACEPC_CTRL module, which are BTB1, BTB3, BTB5 contactor control module and ACEPC contactor control module respectively. External interaction signals include ground power connection signal ACEP_PLUG, ground power switch signal ACEP_SW, ACGB1 contactor control signal ACGB1, ACGB2 contactor control signal ACGB2.

[0137] Example 3

[0138] Figure 3 A steady-state working test case of the disclosed embodiment of the present invention is schematically shown.

[0139] In an illustrative embodiment, according to the steady-state operation related requirements in the system preliminary design requirements, the steady-state operation test case involves 4 variable parameters, all of which are Boolean variables with two logical states. Therefore, 24 steady-state operation test cases are formed, that is, 16 steady-state operation test cases. Figure 3 As shown, the horizontal axis is the time axis, and the vertical axis is the ground power connection signal ACEP_PLUG, the ground power switch signal ACEP_SW, the ACGB1 contactor control signal ACGB1, and the ACGB2 contactor control signal ACGB2 from top to bottom. The test time is 10s, and each 0.625s is a test case, with a total of 16 groups.

[0140] Example 4

[0141] Figure 4 The busbar status result of the system steady-state logic simulation test of the embodiment disclosed in the present invention is schematically shown. Figure 5 The contactor state result of the system steady-state logic simulation test of the embodiment disclosed in the present invention is schematically shown. In an exemplary embodiment, a simulation test is performed using a steady-state working test case to obtain a system steady-state logic result.

[0142] Group 1, from 0s to 0.625s, the ground power plug is inserted, the ground power switch is closed, the ACGB1 contactor is turned on, and the ACGB2 contactor is turned on. At this time, the G1 main power supply supplies power to BUS1, the G2 main power supply supplies power to BUS2, BUS1 and BUS2 are powered normally, and the ACEPC, BTB1, BTB2, and BTB5 contactor control instructions are all disconnected.

[0143] Group 2, from 0.625s to 1.25s, the ground power plug is inserted, the ground power switch is closed, the ACGB1 contactor is connected, and the ACGB2 contactor is disconnected. At this time, the G1 main power supply supplies power to BUS1, BUS1 is powered normally, BUS2 loses power, and the ACEPC, BTB1, BTB2, and BTB5 contactor control instructions are all disconnected.

[0144] Group 3, from 1.25s to 1.875s, the ground power plug is inserted, the ground power switch is closed, the ACGB1 contactor is disconnected, and the ACGB2 contactor is connected. At this time, the G2 main power supply supplies power to BUS2, BUS2 is powered normally, BUS1 loses power, and the ACEPC, BTB1, BTB2, and BTB5 contactor control instructions are all disconnected.

[0145] Group 4, from 1.875s to 2.5s, the ground power plug is inserted, the ground power switch is closed, the ACGB1 contactor is disconnected, and the ACGB2 contactor is disconnected. At this time, the ground power EP supplies power to BUS1 and BUS2, and BUS1 and BUS2 are powered normally. The control instructions of ACEPC, BTB1, BTB2, and BTB5 contactors are all turned on.

[0146] Group 5, from 2.5s to 3.125s, the ground power plug is inserted, the ground power switch is turned off, the ACGB1 contactor is turned on, and the ACGB2 contactor is turned on. At this time, the G1 main power supply supplies power to BUS1, the G2 main power supply supplies power to BUS2, BUS1 and BUS2 are powered normally, and the ACEPC, BTB1, BTB2, and BTB5 contactor control instructions are all turned off.

[0147] Group 6, from 3.125s to 3.75s, the ground power plug is inserted, the ground power switch is turned off, the ACGB1 contactor is turned on, and the ACGB2 contactor is turned off. At this time, the G1 main power supply supplies power to BUS1 and BUS2, and BUS1 and BUS2 are powered normally. The ACEPC contactor control command is turned off, and the BTB1, BTB2, and BTB5 contactor control commands are all turned on.

[0148] Group 7, from 3.75s to 4.375s, the ground power plug is inserted, the ground power switch is turned off, the ACGB1 contactor is turned off, and the ACGB2 contactor is turned on. At this time, the G2 main power supply supplies power to BUS1 and BUS2, and BUS1 and BUS2 are powered normally. The ACEPC contactor control command is turned off, and the BTB1, BTB2, and BTB5 contactor control commands are all turned on.

[0149] Group 8, from 4.375s to 5s, the ground power plug is plugged in, the ground power switch is turned off, the ACGB1 contactor is turned off, and the ACGB2 contactor is turned off. At this time, BUS1 and BUS2 lose power supply, and the ACEPC, BTB1, BTB2, and BTB5 contactor control instructions are all turned off.

[0150] Group 9, from 5s to 5.625s, the ground power plug is disconnected, the ground power switch is turned on, the ACGB1 contactor is turned on, and the ACGB2 contactor is turned on. At this time, the G1 main power supply supplies power to BUS1, the G2 main power supply supplies power to BUS2, BUS1 and BUS2 are powered normally, and the ACEPC, BTB1, BTB2, and BTB5 contactor control instructions are all disconnected.

[0151] Group 10, from 5.625s to 6.25s, the ground power plug is disconnected, the ground power switch is turned on, the ACGB1 contactor is turned on, and the ACGB2 contactor is disconnected. At this time, the G1 main power supply supplies power to BUS1 and BUS2, and BUS1 and BUS2 are powered normally. The ACEPC contactor control command is disconnected, and the BTB1, BTB2, and BTB5 contactor control commands are all connected.

[0152] Group 11, from 6.25s to 6.875s, the ground power plug is disconnected, the ground power switch is turned on, the ACGB1 contactor is disconnected, and the ACGB2 contactor is turned on. At this time, the G2 main power supply supplies power to BUS1 and BUS2, and BUS1 and BUS2 are powered normally. The ACEPC contactor control command is disconnected, and the BTB1, BTB2, and BTB5 contactor control commands are all connected.

[0153] Group 12, from 6.875s to 7.5s, the ground power plug is disconnected, the ground power switch is turned on, the ACGB1 contactor is disconnected, and the ACGB2 contactor is disconnected. At this time, BUS1 and BUS2 lose power supply, and the ACEPC, BTB1, BTB2, and BTB5 contactor control instructions are all disconnected.

[0154] Group 13, from 7.5s to 8.125s, the ground power plug is disconnected, the ground power switch is disconnected, the ACGB1 contactor is connected, and the ACGB2 contactor is connected. At this time, the G1 main power supply supplies power to BUS1, the G2 main power supply supplies power to BUS2, BUS1 and BUS2 are powered normally, and the ACEPC, BTB1, BTB2, and BTB5 contactor control instructions are all disconnected.

[0155] Group 14, from 8.125s to 8.75s, the ground power plug is disconnected, the ground power switch is disconnected, the ACGB1 contactor is connected, and the ACGB2 contactor is disconnected. At this time, the G1 main power supply supplies power to BUS1 and BUS2, and BUS1 and BUS2 are powered normally. The ACEPC contactor control command is disconnected, and the BTB1, BTB2, and BTB5 contactor control commands are all connected.

[0156] Group 15, from 8.75s to 9.375s, the ground power plug is disconnected, the ground power switch is disconnected, the ACGB1 contactor is disconnected, and the ACGB2 contactor is connected. At this time, the G2 main power supply supplies power to BUS1 and BUS2, and BUS1 and BUS2 are powered normally. The ACEPC contactor control command is disconnected, and the BTB1, BTB2, and BTB5 contactor control commands are all connected.

[0157] Group 16, from 9.375s to 10s, the ground power plug is disconnected, the ground power switch is disconnected, the ACGB1 contactor is disconnected, and the ACGB2 contactor is disconnected. At this time, BUS1 and BUS2 lose power supply, and the ACEPC, BTB1, BTB2, and BTB5 contactor control instructions are all disconnected.

[0158] Example 5

[0159] Figure 6 The contactor fault injection module according to the disclosed embodiment of the present invention is schematically shown.

[0160] In an illustrative embodiment, adding two switch elements to the contactor SPST can construct a contactor connection fault and a contactor disconnection fault model. The S1 switch is connected in parallel at both ends of the contactor contact. When the contactor connection fault signal is triggered, the S1 switch is closed to connect the two ends of the contactor contact together, thereby simulating a contactor connection fault. The S2 switch is connected in series in the contactor contact path. When the contactor disconnection fault signal is triggered, the S1 switch is disconnected to disconnect the transmission path of the contactor contact, thereby simulating a contactor disconnection fault. The interface Ctrl is the contactor SPST control end, SPST_S and SPST_C are the contactor SPST contact ports, State is the contactor SPST state output signal, FTO is the contactor SPST cannot disconnect fault injection signal, and FTC is the contactor SPST cannot connect fault injection signal.

[0161] In an illustrative embodiment, a contactor fault injection model is used to replace a contactor in a steady-state logic simulation model of a power distribution system to obtain a steady-state logic fault simulation model of a power distribution system.

[0162] The single contactor on-fault and off-fault conditions are coupled with the steady-state operation test cases to obtain steady-state logic fault test cases. That is, a steady-state operation traversal test is performed in each fault mode of each contactor.

[0163] In an illustrative embodiment, based on the system function allocation design, time response parameters, etc., the steady-state logic simulation model of the power distribution system is modified and updated to obtain a state transition simulation model of the power distribution system.

[0164] In an illustrative embodiment, based on the power distribution system state transition simulation model, the device internal control and protection implementation method is refined, and the device failure mode is introduced to establish a power distribution system function implementation simulation model.

[0165] Adjust the system state transition compliance simulation test case interface and establish the equipment function implementation compliance simulation test case. Carry out equipment function implementation compliance traversal test to verify the rationality of the equipment implementation method and the system robustness under fault conditions.

[0166] In an illustrative embodiment, based on the power distribution system function realization simulation model, the equipment electrical performance simulation model and the system model are connected through interface tool software to enable the simulation data of the two to interact and establish a power distribution system performance realization simulation model, so that the simulation can be completed collaboratively in two different types of simulation software.

[0167] Adjust equipment functions to implement compliance simulation test interfaces, establish equipment performance to implement compliance simulation test cases, and conduct system control and protection, and load management tests.

[0168] The above is only a specific embodiment of the present invention, and the present invention is described in detail. The unexplained part is a conventional technology. However, the protection scope of the present invention is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A staged collaborative simulation analysis method for a power distribution system, characterized in that: include: Step 1: According to the preliminary technical requirements of the system, establish a steady-state logic simulation model of the power distribution system, and use the steady-state logic simulation model of the power distribution system to perform a system steady-state logic simulation test; Step 2: Based on the steady-state logic simulation model of the power distribution system, introduce the system failure mode, establish the steady-state logic failure simulation model of the power distribution system, and use the steady-state logic failure simulation model of the power distribution system to perform the system steady-state logic failure simulation test; Step 3: On the basis of the steady-state logic simulation model of the power distribution system, the time parameters and system redundancy design of the power distribution system are supplemented, a state transition simulation model of the power distribution system is established, and the state transition simulation model of the power distribution system is used to perform a system state transition simulation test; Step 4: Based on the power distribution system state transition simulation model, refine the equipment internal control and protection implementation method, introduce equipment failure mode, establish a power distribution system function implementation simulation model, and use the power distribution system function implementation simulation model to perform system function implementation simulation test; Step 5: On the basis of the power distribution system function realization simulation model, according to the electrical performance parameters of the equipment, establish the power distribution system performance realization simulation model, and conduct system performance realization simulation test.

2. The method according to claim 1, characterized in that: The steady-state logic simulation model of the power distribution system includes: The aircraft power supply simplified module also includes one or more of a main power supply, a backup power supply, an emergency power supply, a ground power supply and a secondary power supply simplified module; The preliminary architecture module of power distribution also includes busbar settings, contactor settings and their connection relationships; The external interactive signal module also includes key signals for the interaction between the switch control panel, the human-machine interface and the power distribution system; System load simplification module, used to simulate the load characteristics of aircraft electrical equipment; The system preliminary control module is used to collect status signals from the aircraft power simplification module, external interaction signal module, and power distribution preliminary architecture module, determine the current power distribution system status based on the collected status signals, and output the power distribution system control signal.

3. The simulation analysis method according to claim 1, characterized in that: The method for performing a system steady-state logic simulation test also includes: Generate multiple steady-state operation test cases based on the steady-state operation related requirements in the preliminary technical requirements of the system; call the test cases to perform system steady-state tests to confirm the compliance of the steady-state logic simulation model of the distribution system with the simulation requirements.

4. The simulation analysis method according to claim 1, characterized in that: The distribution system steady-state logic fault simulation model also includes: Power supply fault injection module, used to simulate the fault condition of power supply losing output; Contactor fault injection module, used to simulate the fault conditions of abnormal opening and closing of contactors; Busbar fault injection module, used to simulate the fault condition of busbar short circuit causing voltage over-limit; The diode fault injection module is used to simulate the fault conditions of diode open circuit and short circuit.

5. The simulation analysis method according to claim 1, characterized in that: The method for performing a system steady-state logic fault simulation test also includes: Combine system steady state and failure modes to design multiple steady state logic failure test cases; According to the test cases, the steady-state logic fault simulation model of the power distribution system is used to perform coupling tests of the system steady-state and fault modes.

6. The simulation analysis method according to claim 1, characterized in that: The method for establishing a distribution system state transition simulation model also includes: Determine the functional allocation of system equipment, decompose the steady-state logic simulation model of the power distribution system into different equipment subsystems, and configure corresponding input and output interfaces for each equipment subsystem; Improve the time parameters in the model, including but not limited to contactor action time, data delay time and data filtering time; Improve the redundant design of the system in the model, including but not limited to redundant power supply of equipment, redundant control instructions, redundant acquisition, and hardware interlocking of the distribution network; Add AC power supply parallel check, and form an AC power supply parallel detection module by detecting the number of existing busbar power supply paths; The improved equipment modules and AC power supply parallel detection module are connected to obtain a distribution system state transition simulation model.

7. The simulation analysis method according to claim 1, characterized in that: The method for performing a system state transition simulation test also includes: Based on multiple steady-state logic fault test cases, they are combined in pairs to obtain state transition test cases. According to the distribution system state transition simulation model, the state transition test cases are used to carry out system state transition simulation tests to monitor the bus power supply situation and AC power supply parallel situation.

8. The simulation analysis method according to claim 1, characterized in that: Methods for establishing a simulation model for realizing power distribution system functions include: Confirm the system hardware connection relationship and refine the architecture module; Confirm the implementation method of internal control and protection of the equipment and refine the control module; Add device-level failure modes based on device implementation methods, including one or more of contactor / relay auxiliary contact failure, controller failure, line failure, and controller power supply failure.

9. The simulation analysis method according to claim 1, characterized in that: Methods for conducting simulation tests on system functions include: According to the device function implementation, adjust the state transition test case interface and establish the function implementation test case; carry out system function implementation simulation test to verify the rationality of the device implementation method and the system robustness under fault conditions.

10. The simulation analysis method according to claim 1, characterized in that: Methods for conducting system performance simulation tests include: According to the device performance realization method, adjust the function realization test cases and establish the performance realization test cases; Conduct simulation tests on system performance under system control and protection and / or load management functions.

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